Use After Free in Mozilla Firefox
CVE-2017-7828
A use-after-free vulnerability can occur when flushing and resizing layout because the "PressShell" object has been freed while still in use. This results in a potentially exploitable crash during these operations. This vulnerability affects Firefox < 57, Firefox ESR < 52.5, and Thunderbird < 52.5.
Vulnerability class: Use-After-Free
EPSS: 0.074 (93.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Mozilla Thunderbird — versions unspecified
- Debian Debian_linux — versions 7.0, 8.0, 9.0
- Redhat Enterprise_linux_desktop — versions 6.0, 7.0
- Redhat Enterprise_linux_server — versions 6.0, 7.0
- Redhat Enterprise_linux_server_aus — versions 7.4
- Redhat Enterprise_linux_server_eus — versions 7.4, 7.5
- Redhat Enterprise_linux_workstation — versions 6.0, 7.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@mozilla.org (mailing-list, x_refsource_MLIST, Third Party Advisory)
- security@mozilla.org (Permissions Required, x_refsource_CONFIRM, Third Party Advisory, Issue Tracking)
- security@mozilla.org (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
- security@mozilla.org (Permissions Required, x_refsource_CONFIRM, Third Party Advisory, Issue Tracking)
- security@mozilla.org (x_refsource_CONFIRM, Vendor Advisory)
- security@mozilla.org (x_refsource_CONFIRM, Vendor Advisory)
- security@mozilla.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
- security@mozilla.org (x_refsource_CONFIRM, Vendor Advisory)
- security@mozilla.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_SECTRACK)
- security@mozilla.org (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
Frequently asked questions
- What is CVE-2017-7828?
- CVE-2017-7828 is a critical-severity vulnerability in Mozilla Firefox, classified under Use After Free. CVSS score: 9.8/10. Published 2018-06-11.
- How severe is CVE-2017-7828?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2017-7828 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.